Sodium Phosphate. Natri Phosphas. Phos-phas Natricus. Sodae Phosphas. Sodii Phosphas.

Common Name

Phosphate of Soda.

Chemical Properties

Formula, Na2HPO4, I2aH2O, Sp, gravity, 1.55. It is prepared by neutralizing orthophospboric acid with carbonate of sodium, and is also made from bone-ash. It crystallizes in large, transparent, monoclinic prisms containing twelve molecules of water of crystallization. It has a mild, cooling, saline taste. It is soluble in two parts of hot and in six of cold water. It is insoluble in alcohol. Solutions are slightly alkaline.


The pure phosphate of soda is triturated as directed under Class VII, American Homaeopathic Pharmaco-paia. (Should be kept well corked).

Physiologico-Chemical Data

This salt is found in the blood, muscles, nerve and brain-cells, as well as in the intercellular fluids. Through the presence of this salt, lactic acid is decomposed into carbonic acid and water. It absorbs the carbonic acid, taking up two molecules for every molecule of itself, and carries it to the lungs, where the oxygen of the air sets the carbonic acid free in exchange for oxygen, which latter is taken up by the iron contained in the blood corpuscles. Natrum phos, is the remedy for conditions arising from excess of lactic acid. It prevents mspissation of the bile and mucus with crystallization of cholesterin in the gall duct and will thus remove the cause of many cases of jaundice, hepatic colic, bilious headache and imperfect assimilation of fats from lack of bile. It is useful in podagra, gout, as well as in acute and chronic articular rheumatism, being thus a remedy for the so-called acid diathesis.

The role of this salt in the normal economy, according to Moleschott and Schussler, largely consists in the catalysis of lactic acid in the blood, thus purifying that fluid organ from this effete product of muscular function, which transforms stored glycogen into the acid. The liver is the prime and master laboratory of the animal body. It is essential to both the nitrogenous and the hydro-carbonaceous transformations, to the renewal and the depuration of the blood, to the production of glycogen and grape sugar from starchy and saccharine food, and to the higher oxidation of uric acid, and other effete tissue principles, into urea, ready for elimination by the kidney, and by bile-formation contributes to the intestinal work- When inert, this organ falls short of this extensive function; when overactive, it exceeds it, and overproductions appear with symptomatic effects. These functions are principally due to cell-action. There are two classes of functional or parenchymatous cells; the biliary, spread out as epithelium in the capillary' branches of the ducts, in intimate relation 8 with the vessels of the liver and likewise with the remaining set of functional cells - viz: those of the hepatic acini, also lying; in intimate relation to the blood vessels and to the biliary capillaries, with their glandular epithelium.

This double duty belongs to the large cells of the acini - viz: the formation of glycogen and the formation of uric acid. In addition, the old red blood-globules are here in the liver, but in the portal system of veins, now become capillary in the acini, are finally disintegrated, and the new-formed globules perfected. All of these varied functions, separate as they are, undoubtely assist each other, furnishing necessary chemical exchanges, etc. The glycogen is, believed to be mainly carried away in the blood-current, to be stored in the muscular tissues, furnishing motor energy thereto, and being chemically split into two parts of lactic acid. This acid aids in later vital functions of the body, and is at last transformed into carbonic acid and water, while circulating in the blood. This transformation takes place through the presence in the blood of phosphate of soda - Nalr. phos. - and by a catalytic action of this salt. Any deficiency in this prevents this chemical change, and the lactic acid remains as such. An acid state of the system now prevails; rheumatism, dyspepsia, intestinal troubles, etc., ensue.

According to Schussler, by the administration of molecular doses of this drug, this catalytic action is at once restored - the acid state ceases, and the rheumatic and other symptoms subside. (J. C. Morgan, M. D).

Uric acid is kept soluble in the blood by the presence of the phosphate of soda and the natural temperature of the blood. Whenever there is a deficiency of this salt, uric acid is combined with the soda, forming the urate of soda, an insoluble salt and deposited near the points producing gout and acute inflammatory rheumatism. During an attack of acute gout, we find that the excretion of uric acid is diminished in proportion to the amount of the deposit of urate of soda around the points.

Natrum phosph. serves to emulsify fatty acids; it is therefore a remedy for all dyspeptic conditions traceable to fats, or such as are aggravated by their use. Besides combining with these acids the phosphate of soda appropriates molecules of albumen, which acts bio-chemically like an acid.

The white blood corpuscles, leucocytes or lymph corpuscles carry molecules of fat and peptones, which latter are modified albuminoids, from the intestinal walls to the blood and thence to the tissues. They do this by virtue of their active movements. From the walls of the intestinal tract the passage of the leucocytes, now laden with peptones, is a direct one, while those carrying the fat molecules reach the goal by an indirect way - namely, through the thoracic duct. Finally they reach the tissues through the walls of the capillaries. Here, after the peptones are retransfonned into albuminoids, they are deposited and become material for the growth of young cells which are formed by division.

If the progress of the leucocytes carrying the fat molecules is stopped in their course through the lymphatic glands, skin, bones or lungs, phlegmonous and glandular inflammations, and swellings take place as well as tubercular conditions of these organs and tissues.